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Motion Detection
26-07-2017
Type of recording method where video is only recorded when motion is detected within the camera’s field of view. Helps to significantly reduce the amount of video stored and prolong the life of your video recorder.
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Varifocal Lens
05-07-2017
Type of camera lens with two focal lengths, typically seen in an x-y mm format, which notates that the lens may adjusted so the camera’s field of view can be altered to suit the environment. Though this allows a camera’s “zoom” to be adjusted, it does not occur automatically or with the push of a button. The camera’s focal length is altered locally to provide a wider field of view with a nearer target area or a more narrow field a view with a further target area.
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Modal Dispersion
21-06-2017
Modal Dispersion : A broadening of a waveform over long distances. Modal Dispersion (or Inter-modal Dispersion) occurs in multi-mode fibers, because light is bounced down different reflective paths (e.g. modes) in the fiber. As the distance increases, the path (mode) begins to spread and the arrival time for the different light rays begins to vary. A large variance (dispersion) increases the chance that the optical receiver may interpret the incoming signals incorrectly. Modal dispersion is a major problem with multi-mode fibers.
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Different types of cameras
31-05-2017
CCTV : Closed circuit television utilizes video security cameras to capture and transmit video feeds to a central location on a specific number of monitors. HD CCTV : Also known as HD-SDI, High Definition Closed Circuit Television is an industry standard for transmitting uncompressed HD video (up to 1080p) over coaxial cable which allows for IP quality video over an analog infrastructure. Dome Camera : A type of camera that is known for its dome-like shape and one of the most commonly used security Camera types. Their sleek, inconspicuous profile makes dome cameras an ideal camera for discrete video surve
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DVR & NVR
17-05-2017
DVR : Digital video recorders capture and store video feeds produced by analog security cameras onto a hard drive. DVRs come in two types, standalone units similar to your cable box and PC-based towers that are specifically built computers with a DVR card to convert the video signal into data to be stored on a hard drive. NVR : Network video recorders capture and store video feeds produced by network IP cameras. Most NVRs come with software which allows immense versatility through a variety of features that can be used to automate aspects of your security operations. NVRs come in standalone units and PC based v
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Multimode Fiber
10-05-2017
An optical fiber with a larger core (typically 50 or 62.5 microns) than singlemode fiber. The core is made of plastic or glass fibers. It is the most commonly used fiber for cabling short distances as used in LANs. The name multimode comes from the fact that light rays travel down multiple reflective paths (modes) within the fiber. This allows light to enter the core at different angles, making it easier to connect to broader light sources such as LEDs (light emitting diodes). Fiber optic interfaces and multimode fiber-based transmission systems are less expensive than those based on singlemode fiber. However, the
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